/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hadoop.hive.ql.udf.generic;

import org.apache.hadoop.hive.ql.exec.UDTFOperator;
import org.apache.hadoop.hive.ql.metadata.HiveException;

/**
 * UDTFCollector collects data from a GenericUDTF and passes the data to a
 * UDTFOperator.
 */
public class UDTFCollector implements Collector {

  /*
   * (non-Javadoc)
   * 
   * @see
   * org.apache.hadoop.hive.ql.udf.generic.Collector#collect(java.lang.Object)
   */
  final UDTFOperator op;
  private transient int counter;

  public UDTFCollector(UDTFOperator op) {
    this.op = op;
  }

  @Override
  public void collect(Object input) throws HiveException {
    op.forwardUDTFOutput(input);
    counter++;
  }

  public int getCounter() {
    return counter;
  }

  public void reset() {
    counter = 0;
  }
}
